LarpixServer/LarpixServer/Account/BackgroundDelete.cs

using System.Text;
using LarpixServer.Filesystem;

namespace LarpixServer.Account;

public class BackgroundDelete : BackgroundService
{
    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        while (!stoppingToken.IsCancellationRequested)
        {
            Console.WriteLine("Running Background Delete");
            await ScanAndDelete(stoppingToken);

            await Task.Delay(TimeSpan.FromDays(0.5), stoppingToken);
        }
        Console.WriteLine("Stopped Background Delete");
    }

    private async Task ScanAndDelete(CancellationToken stoppingToken)
    {
        try
        {
            if (!Fs.Exists(LarpixServer.Utils.Utils.ACCOUNTS_DATA_DIR)) return;
            foreach (var accountName in Fs.ReadDirectory(LarpixServer.Utils.Utils.ACCOUNTS_DATA_DIR))
            {
                string account = Path.Combine(LarpixServer.Utils.Utils.ACCOUNTS_DATA_DIR, accountName);
                if (stoppingToken.IsCancellationRequested) return;
                try
                {
                    string lpath = Path.Combine(account, "lastlogin");
                    if (!Fs.Exists(lpath))
                    {
                        continue;
                    }
                    DateTimeOffset lastLogin =
                        DateTimeOffset.FromUnixTimeSeconds(
                            long.Parse(Encoding.UTF8.GetString(await Fs.ReadFile(lpath))));
                    if (lastLogin < DateTimeOffset.UtcNow.AddMonths(-12))
                    {
                        string id = Path.GetFileName(account);
                        SemaphoreSlim userLock = Utils.GetUserLock(id);
                        await Requests.createLock.WaitAsync();
                        await userLock.WaitAsync();
                        try
                        {
                            string username = await Account.Utils.NameFromId(id);
                            if (!string.IsNullOrEmpty(username))
                            {
                                Fs.DeleteFile($"{LarpixServer.Utils.Utils.ACCOUNTS_NAME_DIR}/{username.ToLower()}");
                            }
                            Fs.DeleteDirectory(account);
                            Fs.WriteFile($"{LarpixServer.Utils.Utils.ACCOUNTS_FREEID_DIR}/{id}", []);
                            Console.WriteLine($"Deleted {id} ({username})");
                        }
                        finally
                        {
                            userLock.Release();
                            Requests.createLock.Release();
                        }
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine(e);
                }
                await Task.Delay(5);
            }
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }
    }
}